LAS VEGAS — For billionaire T. Boone Pickens, the third time’s the charm with Donald Trump.

The Texas oilman went all in on the presumed Republican nominee on Wednesday, endorsing his proposed ban on Muslims entering the US and vowing to support him financially.

“I’m not saying it’s permanent, but I’d cut off all the Muslims from coming into the United States until we could vet these people and see,” Pickens, 87, said during a panel discussion at the annual SkyBridge Alternatives (SALT) Conference.

“I mean, if we’re coming into the United States, they can’t tell looking at us,” he said. “They can’t tell what I’m for, what I’m against, or what I might do.”

During a follow-up session with reporters, Pickens said that he didn’t think that banning Muslims would have any economic effects on the country, and that he doubted that they’ve “impacted the economy at all.”

The full-throated support by Pickens, who leads hedge fund BP Capital Management, comes after he threw his weight behind two other, failed Republican candidates.

“I talked to [Trump] the day before yesterday,” Pickens said. “He said, ‘Well, you were supporting Jeb Bush and Carly [Fiorina].’ And I said. ‘I’m not supporting them anymore.’ So I said, ‘I’m on board,’ and we laughed.”

That might prove to be good timing for Trump, since Steve Mnuchin, his national finance chairman, was seen at the hedgie-filled conference.

Pickens played it close to the vest when asked about the size of his donation.

“I’ll give. I’m not going to give you the dollar amount,” he said.

Last year, in the wake of the San Bernardino terrorist shootings, Trump said he would ban Muslims from entering the country until the government had a chance to check their background.

Syed Farook, the principal shooter, was born in Chicago and had grown up in California, but had flown to Saudi Arabia several times in the years before the shooting.

His wife, Tashfeen Malik, was born in Pakistan.

Kobe Bryant has taken on Michael Jordan, LeBron James and Kevin Durant successfully — but his next target is J.K. Rowling.

The former Los Angeles Lakers guard said he’s working on a book project — a “sports fantasy series for children” that’s in the vein of Rowling’s massively successful “Harry Potter” series.

“I’m really fascinated by storytelling,” Bryant said during an interview with ESPN at SALT.

“As a kid growing up, I didn’t really have any books to read that centered on that.”

Bryant, who retired this year after spending 20 years with the Lakers and winning five NBA championships, added that Rowling was his “muse.”